diff --git a/crates/fayalite/src/sim/value.rs b/crates/fayalite/src/sim/value.rs
index def2ae3..b6a4e4b 100644
--- a/crates/fayalite/src/sim/value.rs
+++ b/crates/fayalite/src/sim/value.rs
@@ -358,11 +358,7 @@ impl<T: Type> DerefMut for SimValue<T> {
 
 impl<T: Type> fmt::Debug for SimValue<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let inner = self.inner.share();
-        f.debug_struct("SimValue")
-            .field("ty", &inner.ty)
-            .field("value", &inner.value)
-            .finish()
+        T::SimValue::fmt(&**self, f)
     }
 }